/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/Stack/NiagaraStackFunctionInput.h
Gets the variable that serves as an edit condition for this input.
[TOptional](API\Runtime\Core\IO\TOptional)< [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) > GetEditConditionVariable() const